references to documentation have changed

[alensiljak]

Pretty much all the references to the documentation (ledger, hledger) in ReadMe are now outdated and lead to 404 pages.

[egwynn]

Yep. There are two links which are broken. One is repeated a few times and the other only once. Here's how they should be fixed:

Old (broken)	New (working as of this posting)
http://ledger-cli.org/2.6/ledger.html#Using-timeclock-to-record-billable-time	https://www.ledger-cli.org/2.6/ledger.html#Using-timeclock-to-record-billable-time
https://hledger.org/MANUAL.html#timelog-files	https://hledger.org/manual.html#timeclock-format